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cathode
(redirected from cathodal)

    Also found in: Dictionary/thesaurus, Medical, Encyclopedia, Wikipedia 0.06 sec.

cathode

In an electrolytic cell, the negative electrode, towards which positive particles (cations), usually in solution, are attracted. See electrolysis. The cathode is given its negative charge by connecting it to the negative side of an external electrical supply.

In a thermionic valve, cathode ray tube, or similar device, the cathode is the negative electrode, from which electrons are emitted.

In these cases, the flow of electrons is into the device at the cathode. The term is also inconsistently applied in some other cases to electrodes at which the flow of electrons is out of the device – for example, to the negative terminal of a battery.

cathode

In electronics, the part of an electronic device in which electrons are generated. In a thermionic valve, electrons are produced by the heating effect of an applied current; in a photocell, they are produced by the interaction of light and a semiconducting material. The cathode is kept at a negative potential relative to the device's other electrodes (anodes) in order to ensure that the liberated electrons stream away from the cathode and towards the anodes.



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? Mentioned in ? References in periodicals archive
 
34) They performed a series of studies using high-voltage cathodal ES (120 pps, 10% below visible contractions) on frog and rat models and found that up to four 30-minute treatment sessions with either 30- or 60-minute rest periods between treatments curbed edema formation for up to 24 hours after injury.
Effect of neuromuscular electrical stimulation on ankle swelling in ... by Cywinski, Jozef K. / Physical Therapy
11,22) In contrast, other investigators showed that pulsed monophasic cathodal stimulation (high-voltage pulsed current [HVPC]) with a pulse duration of 13 microseconds (twin peaks of 5 and 8 microseconds) limits edema in frogs and rats with either crush injury or hyperflexion injury.
Transcutaneous electrical nerve stimulation at both high and low ... by Sluka, Kathleen A. / Physical Therapy
Thus, both hands received anodal and cathodal TWG at the same dosage of current.
Management of postsurgical hyperhidrosis with direct current and tap ... by Cincinelli-Walker, Laura / Physical Therapy
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